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However, he went on to confess that he was “foolish” for name-calling, while admitting he “hated” doing it — but ultimately he said he had “no choice”.

The president had previously mocked Chairman Kim during public appearances and regularly referred to him as “little rocket man” and said he was on a “suicide mission”.

Mr Trump discussed the contents of his and Chairman Kim’s meeting and said that the North Korean leader fully understood that he had to denuclearise and that he “didn’t fight it”. He added that the response was “almost immediate”.

Mr Trump went on to criticise his predecessors, without naming any specific administrations, for having a “policy of silence” on North Korea, which he said “was not the answer”.

Kim Jong-Un and Donald Trump in Singapore for a meeting (Image: GETTY)

Donald Trump and Kim Jong-un hold historic summit - in pictures

North Korea's leader Kim Jong-un shakes hands with US President Donald Trump at their historic US-North Korea summit

On Tuesday, Mr Trump and Kim signed a document which stipulates for the denuclearisation of North Korea.

However, the credibility of the agreement has since been brought into question, with analysts saying that the clause does not ensure the complete, verifiable and irreversible dismantlement (CVID) of the country’s nuclear arsenal.

As well as denuclearisation, the document also aims to bring about peace between the two countries, political stability to the Korean Peninsula and a commitment to recovering the remains of prisoners of war and soldiers who went missing in action during the 1950-53 Korean War.

Mr Trump insisted during the press conference which followed the summit, that he intended to invite Chairman Kim to meet with him at the White House in Washington, D.C., according to reports from North Korea’s Central News Agency the leader has since accepted the invitation.